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mmm-L.. anrfnv'rma wrucmon mili c. ru. 19in. l n y Patented DB6. 16, 1919.

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nor BENs'oN HALL, or carcasa, rumors.

BATTERY-PLATE.

Specification of Iietters Patent.'

Patented Dec, 16,1919;

Application led December 1G, 1918. Seriell No. 266,857.

To all wmmt may concern:

Be it; known that I, ROY BsxsoN'HaLL, a. citizen of the United States of Amerlca, and a resident of Chicago,count v of (oo'k, and State of Il1inois,have invented certain nevi' and useful Improvements in Battery- Plates, of which the following is a specification.

This invention relates to storagel battery plates, particularly the structure thereof and jects of,tl1e invention are to provide an improved form of light weight battery plate adapted" to withstand exceptionally rough usage; to provide active material umts or blocks of improved form adapted for manufacturing rapidly bv machinery; to provide an improved form of rigid grid or casing adapted for molding integrally, to embrace` a'nd hold such blocks; to provide a highly unified combination of such grid and blocks adapted to withstand warping or buckling; to provide a plate of the character described having' stiil'ening ribs running both vertically and crosswise, and also having numerous points or small areas on its surface foraccess of the electrolyte to the active maberial; and to provide improved methods for forming and assembling the parts into plates.

`An illustrative embodiment of this invention is sh'ovvn by theaccompanving draw` l ings,- in Which- Figure l 1S mainlva front elevation of a. finished plate with part of the front sideof the casing removed to show the active material.`

Fig. :2 is a cross section on the line 2 2 of Figal, a mold also being indicated by dotted lines'.

Fig. 3 is a vie'tv of one of the act-ive material units or blocks.

' In'the illustrative embodiment shown m' the drawings, the plate as a whole comprises a perforate. hollow gridor casing 1 and a pluralitv of blocks or pellets -2 of active material held therein.

The blocks are rectangular 1n shape so as Ato fit together readily in assembling. Each blockis provided with a plurality of proj ections 3 on each side for exposure to the elect1ol vte. Projections of similar character are also 'provided on theedges, either for exposure to the electrolyte or forcontact The main obwith corresponding projections on adjacent plates. depending on whether the edge of the block fits against an edge wall of the casing or abuts against one of the perforated transverse ribs-l separatiner the blocks'.

The plate is formediy assembling in4 symmetrical order a plurality of blocks edge to edgein a mold 5, with their edges held apart somewhatby the edge projections 3, and then pourin or forcing 1n the lead or alloy around the locks to form the grid or casing. A plate as thus constructed is obviously very rigid and strong even though the Walls be made ver v thin, the ribs -l serving as braces and reinforcements.

The blocks 2, usually consisting of an oxid of lead maybe formed or molded as a paste in any manner desired, as for instance, in a core mold, ill machine or the like, and then dried, 4rea( v for use. The precisenumber of projections 3 on each block and also their arrangement is immaterial, butthe general style andarrangement shown is preferred. The shape of the blocks may also be varied somewhat. The plate mold 5 is so proportioned that when the same is closed, ready for securing the molded metal, the projections 3 all bear snugly against the mold excepting those on ad]a,cent edges vvhich abut together. 'hen the plate is removed from the moldV the distributed` areas vat 3 are nearly all exposed ready for action of the electrolyte, though when assembled certain of the edge projections serve merely to more uniformly interconnect the active material blocks.

The main advantage of `this method, of plate manufacture is that the plates can. be

made b v machinery and in such a manner as to have the lead oxids protected and held securely yin place. Another advant e is that in assembling the core in the mol the component blocks '2 fit automatically olie against another with duebonding apertures between the edge projections for the'casin metal. and a plain-faced mold Ina5 be use 1n which different shapes, sizes, and styles of blocks may be used.` Anv amount of active .surface may be ex nosed in the plate by changing ,th'size o the projections on the pellets. Any st vle of plate may be' cast as the pellets are only cores.

Although but one specific' embodiment of this invention has been herein shown and described, it willvbe understood that nuinerous details ofthe c'cinstiuction shown may be alteredv oi' omitted without departing1 from the spirit of this Iinvention as define bythe following claims.

I claim:

1. The method of making astorage batteii'` plate hauingacontinuoiis multipartite core, whichcoiisists"inl forming al plurality -of blocks ofactive material having rojeetions distributed .over their edges an faces, 'assembling said blockslcontiguouslv edge-to 'edge in a,losetting mold and filling -the l mold, including thefintersticesbetween said projectiosrfwithinetal whereby a casing is molded tightly-:aboutsaid blocks with the tipsy of the side profections exposed for subsequent contact wit i the electrolyte.

2.. The process of making a battery plate, which consists ,in molding a plurality of active inaterialcores inat shape with )ro-jections on their faces, arranging saici cores edge to edge in a mold having sides ari'an d to fit tightly against the oiiter faces of t iecore progections. then moidinga vgrid about said cores' by filling the vacant space about said cores with molten metal, and i when the metal has set. iemoving the mold. Signed at Chicago this 13th day ofDe cember 1918. l

ROY BSON HALL 

